SIST EN IEC 60652:2021
(Main)Overhead line structures - Loading tests (IEC 60652:2021)
Overhead line structures - Loading tests (IEC 60652:2021)
This document specifies the methods and procedures of testing supports for overhead lines.
It applies to the testing of supports and structures of overhead lines.
There is no restriction on the type of material used in the fabrication of the supports which may
include, but not be limited to, metallic alloys, concrete, timber, laminated wood and composite
materials. If required by the client, this document can also be applied to the testing of
telecommunication supports, railway/tramway overhead electrification supports, electrical
substation gantries, street lighting columns, wind turbine towers, ski-lift supports, etc.
Tests on reduced scale models of supports are not covered by this document.
Freileitungstragwerke - Belastungsprüfungen (IEC 60652:2021)
Essais mécaniques des structures de lignes aériennes (IEC 60652:2021)
IEC 60652:2021 est disponible sous forme de IEC 60652:2021 RLV qui contient la Norme internationale et sa version Redline, illustrant les modifications du contenu technique depuis l'édition précédente.
IEC 60652:2021 spécifie les méthodes et procédures d'essai pour les supports de lignes aériennes. Il s'applique aux essais des supports et structures des lignes aériennes. Aucune restriction ne s'applique au type de matériau utilisé pour la fabrication des supports qui peuvent, entre autres, être réalisés en alliages métalliques, en béton, en bois (éventuellement stratifié) et en matériaux composites. Si le client l'exige, le présent document peut également être appliqué dans le cadre d'essais concernant les supports de télécommunication, les supports d'électrification de lignes aériennes pour les chemins de fer/tramways, les portiques de postes électriques, les supports d'éclairage public et de signalisation, les mâts d'éoliennes, les supports de téléphériques, etc. Les essais réalisés sur modèles de supports à échelle réduite ne sont pas couverts par le présent document. Cette troisième édition annule et remplace la deuxième édition parue en 2002. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
a) le titre a été modifié;
b) une référence à la brochure 399 du CIGRE a été ajoutée;
c) à l'Article 7, des limites d'essai ont été ajoutées pour la vitesse et la direction du vent lors des essais;
d) en 10.5, des incréments de charge ont été ajoutés pour les essais destructifs;
e) en 10.7, une exigence a été ajoutée aux essais de supports constitués de matériaux sensibles au fluage : celle-ci est soumise à l'accord entre la station d'essais et le client;
f) à l'Article 17, des exigences ont été ajoutées pour la procédure d'échantillonnage en vue d’étayer le rapport d'essai.
Nosilne konstrukcije nadzemnih vodov - Preskusi obremenitev (IEC 60652:2021)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN IEC 60652:2021
01-december-2021
Nadomešča:
SIST EN 60652:2005
Nosilne konstrukcije nadzemnih vodov - Preskusi obremenitev (IEC 60652:2021)
Overhead line structures - Loading tests (IEC 60652:2021)
Freileitungstragwerke - Belastungsprüfungen (IEC 60652:2021)
Essais mécaniques des structures de lignes aériennes (IEC 60652:2021)
Ta slovenski standard je istoveten z: EN IEC 60652:2021
ICS:
29.240.20 Daljnovodi Power transmission and
distribution lines
SIST EN IEC 60652:2021 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN IEC 60652:2021
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SIST EN IEC 60652:2021
EUROPEAN STANDARD EN IEC 60652
NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2021
ICS 29.240.20 Supersedes EN 60652:2004 and all of its amendments
and corrigenda (if any)
English Version
Overhead line structures - Loading tests
(IEC 60652:2021)
Essais mécaniques des structures de lignes aériennes Freileitungstragwerke - Belastungsprüfungen
(IEC 60652:2021) (IEC 60652:2021)
This European Standard was approved by CENELEC on 2021-09-03. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2021 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 60652:2021 E
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SIST EN IEC 60652:2021
EN IEC 60652:2021 (E)
European foreword
The text of document 11/276/FDIS, future edition 3 of IEC 60652, prepared by IEC/TC 11 “Overhead
lines” was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as
EN IEC 60652:2021.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2022–06–03
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2024–09–03
document have to be withdrawn
This document supersedes EN 60652:2004 and all of its amendments and corrigenda (if any).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Standard IEC 60652:2021 was approved by CENELEC as a European
Standard without any modification.
2
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SIST EN IEC 60652:2021
EN IEC 60652:2021 (E)
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments)
applies.
NOTE 1 Where an International Publication has been modified by common modifications, indicated by (mod), the
relevant EN/HD applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available
here: www.cenelec.eu.
Publication Year Title EN/HD Year
IEC 60050-466 1990 International Electrotechnical Vocabulary - -
(IEV) - Part 466: Overhead lines
AMD/1 2020 - -
ISO/IEC 17025 2017 General requirements for the competence EN ISO/IEC 17025 2017
of testing and calibration laboratories
CIGRE Brochure2009 Improvement on the Tower Testing - -
399 Methodology
3
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SIST EN IEC 60652:2021
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SIST EN IEC 60652:2021
IEC 60652
®
Edition 3.0 2021-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Overhead line structures – Loading tests
Structures des lignes aériennes – Essais mécaniques
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.240.20 ISBN 978-2-8322-9958-6
Warning! Make sure that you obtained this publication from an authorized distributor.
Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.
® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
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SIST EN IEC 60652:2021
– 2 – IEC 60652:2021 © IEC 2021
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references. 5
3 Terms and definitions . 5
4 Categories of tests . 6
4.1 General . 6
4.2 Design tests . 6
4.3 Sample tests . 6
5 General test criteria . 7
6 Acceptability of test station . 7
7 Test specification . 7
8 Test programme . 8
9 Assembly of support . 8
10 Load application . 9
10.1 General . 9
10.2 Combined loads . 9
10.3 Precautions for load application . 9
10.4 Load levels . 9
10.5 Destruction tests . 9
10.6 Tolerances on applied loads . 10
10.7 Loading rate and holding period . 10
11 Measurements . 10
11.1 Load and angle measurements . 10
11.2 Deflection measurements . 10
11.3 Strain measurements . 11
12 Sequence of test loading cases . 11
13 Video documentation . 11
14 Acceptance criteria . 11
15 Premature failure . 11
15.1 Design tests . 11
15.2 Sample tests . 11
15.3 Replacement of components . 12
16 Material specification . 12
17 Test report. 12
18 Record and traceability . 13
Table 1 – Load tolerances . 10
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SIST EN IEC 60652:2021
IEC 60652:2021 © IEC 2021 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
OVERHEAD LINE STRUCTURES – LOADING TESTS
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their
preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
may participate in this preparatory work. International, governmental and non-governmental organizations liaising
with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for
Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence between
any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent
rights. IEC shall not be held responsible for identifying any or all such patent rights.
IEC 60652 has been prepared by IEC technical committee 11: Overhead lines. It is an
International Standard.
This third edition cancels and replaces the second edition published in 2002. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) Title modified;
b) Added reference to CIGRE Brochure 399;
c) In Clause 7, added test limitation for wind speed and direction during testing;
d) In paragraph 10.5, added load increments for destruction tests;
e) In paragraph 10.7, added a requirement for an agreement between client and testing station
when testing supports made of creep-sensitive materials;
f) In Clause 17, added requirements for sampling procedure to be provided in the test report.
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SIST EN IEC 60652:2021
– 4 – IEC 60652:2021 © IEC 2021
The text of this International Standard is based on the following documents:
FDIS Report on voting
11/276/FDIS 11/277/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/standardsdev/publications.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
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SIST EN IEC 60652:2021
IEC 60652:2021 © IEC 2021 – 5 –
OVERHEAD LINE STRUCTURES – LOADING TESTS
1 Scope
This document specifies the methods and procedures of testing supports for overhead lines.
It applies to the testing of supports and structures of overhead lines.
There is no restriction on the type of material used in the fabrication of the supports which may
include, but not be limited to, metallic alloys, concrete, timber, laminated wood and composite
materials. If required by the client, this document can also be applied to the testing of
telecommunication supports, railway/tramway overhead electrification supports, electrical
substation gantries, street lighting columns, wind turbine towers, ski-lift supports, etc.
Tests on reduced scale models of supports are not covered by this document.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies.
For undated references, the latest edition of the referenced document (including any
amendments) applies.
IEC 60050-466:1990, International Electrotechnical Vocabulary (IEV) – Part 466: Overhead
lines
IEC 60050-466:1990/AMD1:2020
ISO/IEC 17025:2017, General requirements for the competence of testing and calibration
laboratories
CIGRE Brochure 399:2009, Improvement on the Tower Testing Methodology
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 60050-466:1990 and
the following apply.
3.1
client
organization which contracts with the testing station and provides the test specification
3.2
design load
load for which the support has been designed
3.3
failure load
limit state loads value at which the support cannot carry any additional load as determined
during the destruction test of the support
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3.4
realignment
process used for restoring the original ‘vertical’ position of the tower after being permanently
deformed due to an intermediate loading case testing
Note 1 to entry: This process usually requires release of bolts in connections, pulling back the tower to its original
position, and finally re-tightening bolts. This procedure is not recommended.
3.5
test report
document summarizing all the relevant aspects of the tests
4 Categories of tests
4.1 General
The objective of support tests is to verify the design method and inherent assumptions, the
method of member detailing and the quality of fabrication, manufacture and material.
With respect to the purpose of the test, the level of instrumentation and the method of execution,
this document refers to two categories of tests:
a) design tests;
b) sample tests.
4.2 Design tests
Design tests are normally carried out on full scale prototype supports, with one or more of the
following objectives:
a) as part of a research and/or development programme in the design of an innovative su
...
SLOVENSKI STANDARD
oSIST prEN IEC 60652:2020
01-marec-2020
Preskusi obremenitev nosilnih konstrukcij nadzemnih vodov
Loading tests on overhead line structures
Belastungsprüfungen an Freileitungstragwerken
Essais mécaniques des structures de lignes aériennes
Ta slovenski standard je istoveten z: prEN IEC 60652:2019
ICS:
29.240.20 Daljnovodi Power transmission and
distribution lines
oSIST prEN IEC 60652:2020 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN IEC 60652:2020
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oSIST prEN IEC 60652:2020
11/270/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 60652 ED3
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2019-12-27 2020-03-20
SUPERSEDES DOCUMENTS:
IEC TC 11 : OVERHEAD LINES
SECRETARIAT: SECRETARY:
South Africa Mr John Dlamini
OF INTEREST TO THE FOLLOWING COMMITTEES: PROPOSED HORIZONTAL STANDARD:
TC 7,TC 115,TC 122
Other TC/SCs are requested to indicate their interest, if any,
in this CDV to the secretary.
FUNCTIONS CONCERNED:
EMC ENVIRONMENT QUALITY ASSURANCE SAFETY
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
Attention IEC-CENELEC parallel voting
The attention of IEC National Committees, members of
CENELEC, is drawn to the fact that this Committee Draft for
Vote (CDV) is submitted for parallel voting.
The CENELEC members are invited to vote through the
CENELEC online voting system.
This document is still under study and subject to change. It should not be used for reference purposes.
Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of which they
are aware and to provide supporting documentation.
TITLE:
Loading tests on overhead line structures
PROPOSED STABILITY DATE: 2026
NOTE FROM TC/SC OFFICERS:
Copyright © 2019 International Electrotechnical Commission, IEC. All rights reserved. It is permitted to download this
electronic file, to make a copy and to print out the content for the sole purpose of preparing National Committee positions.
You may not copy or "mirror" the file or printed version of the document, or any part of it, for any other purpose without
permission in writing from IEC.
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oSIST prEN IEC 60652:2020
2
IEC CDV 60652/Ed3 © IEC:2019 11/270/CDV
1 1. Scope . 4
2 2. Normative references . 4
3 3. Definitions. 4
4 4. Categories of tests . 5
5 4.1 Design tests . 5
6 4.2 Sample tests . 5
7 5. General test criteria . 6
8 6. Acceptability of test station . 6
9 7. Test specification . 6
10 8. Test programme . 8
11 9. Assembly of support . 8
12 10. Load application. 8
13 10.1 Combined loads . 8
14 10.2 Precautions for load application . 9
15 10.3 Load levels . 9
16 10.4 Destruction tests . 9
17 10.5 Tolerances on applied loads . 9
18 10.6 Loading rate and holding period . 9
19 11. Measurements . 11
20 11.1 Load and angle measurements . 11
21 11.2 Deflection measurements . 11
22 11.3 Strain measurements . 11
23 12. Sequence of test loading cases. 11
24 13. Video documentation . 11
25 14. Acceptance criteria . 11
26 15. Premature failure . 12
27 15.1 Design tests . 12
28 15.2 Sample tests . 12
29 15.3 Replacement of components . 12
30 16. Material specification . 12
31 17. Test report . 13
32 18. Record and traceability . 14
33
34
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IEC CDV 60652/Ed3 © IEC:2019 11/270/CDV
35 INTERNATIONAL ELECTROTECHNICAL COMMISSION
36 ____________
37
38 LOADING TESTS ON OVERHEAD
39 LINE STRUCTURES
40
41
42 FOREWORD
43 1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising all
44 national electrotechnical committees (IEC National Committees). The object of the IEC is to promote international co-
45 operation on all questions concerning standardization in the electrical and electronic fields. To this end and in addition to
46 other activities, the IEC publishes International Standards. Their preparation is entrusted to technical committees; any
47 IEC National Committee interested in the subject dealt with may participate in this preparatory work. International,
48 governmental and non-governmental organizations liaising with the IEC also participate in this preparation. The IEC
49 collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions
50 determined by agreement between the two organizations.
51 2) The formal decisions or agreements of the IEC on technical matters express, as nearly as possible, an international
52 consensus of opinion on the relevant subjects since each technical committee has representation from all interested
53 National Committees.
54 3) The documents produced have the form of recommendations for international use and are published in the form of
55 standards, technical specifications, technical reports or guides and they are accepted by the National Committees in that
56 sense.
57 4) In order to promote international unification, IEC National Committees undertake to apply IEC International Standards
58 transparently to the maximum extent possible in their national and regional standards. Any divergence between the IEC
59 Standard and the corresponding national or regional standard shall be clearly indicated in the latter.
60 5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any equipment
61 declared to be in conformity with one of its standards.
62 6) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject of patent
63 rights. The IEC shall not be held responsible for identifying any or all such patent rights.
64 International Standard IEC 60652 has been prepared by IEC technical committee 11: Overhead lines.
65 This second edition cancels and replaces the first edition, published in 1979, and constitutes
66 a technical revision.
67 The text of this standard is based on the following documents:
FDIS Report on voting
11/167/FDIS 11/168/RVD
68
69 Full information on the voting for the approval of this standard can be found in the report on voting
70 indicated in the above table.
71 This publication has been drafted in accordance with the ISO/IEC Directives, Part 3.
72 The committee has decided that the contents of this publication will remain unchanged until 2004. At this
73 date, the publication will be
74 • reconfirmed;
75 • withdrawn;
76 • replaced by a revised edition, or
77 • amended.
78
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IEC CDV 60652/Ed3 © IEC:2019 11/270/CDV
79 LOADING TESTS ON OVERHEAD
80 LINE STRUCTURES
81
82
83
84 1. Scope
85 This International Standard specifies the methods and procedures of testing supports for overhead
86 lines.
87 It is applicable to the testing of supports and structures of overhead lines.
88 There is no restriction on the type of material used in the fabrication of the supports which may
89 include, but not be limited to, metallic alloys, concrete, timber, laminated wood and composite
90 materials. If required by the client, this standard may also be applied to the testing of
91 telecommunication supports, railway/tramway overhead electrification supports, electrical substation
92 gantries, street lighting columns, wind turbine towers, ski-lift supports, etc.
93 Tests on reduced scale models of supports are not covered by this standard.
94 2. Normative references
95 The following referenced documents are indispensable for the application of this document. For dated
96 references, only the edition cited applies. For undated references, the latest edition of the referenced
97 document (including any amendments) applies.
98 IEC 60050(466):1990, International Electrotechnical Vocabulary (IEV) – Chapter 466: Overhead lines
99 ISO/IEC 17025:1999, General requirements for the competence of testing and calibration laboratories
100 3. Definitions
101 For the purposes of this International Standard, the following definitions apply. The definitions listed
102 below supplement those given in lEC 60050(466).
103 1.1 3.1
104 client
105 organization which contracts with the testing station and provides the test specification
106 1.2 3.2
107 design load
108 load for which the support has been designed
109
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110 1.3 3.3
111 failure load
112 point at which the support cannot carry any additional load
113 NOTE It is also known as the limit state failure load and is determined during a destruction test on the support.
114 1.4 3.4
115 Realignment
116 Realignment is the process used for restoring the original ‘vertical’ position of the tower after being
117 permanently deformed due to an intermediate loading case testing. This process usually requires
118 release of bolts in connections, pulling back the tower to its original position, and finally re-tightening
119 bolts. This procedure is not recommended.
120 1.5 3.4
121 test report
122 document summarizing all the relevant aspects of the tests
123 4. Categories of tests
124 The objective of support tests is to verify the design method and inherent assumptions, the method of
125 member detailing and the quality of fabrication, manufacture and material.
126 With respect to the purpose of the test, the level of instrumentation and the method of execution, this
127 standard refers to two categories of tests:
128 a) design tests;
129 b) sample tests.
130 4.1 Design tests
131 Design tests are normally carried out on prototype supports, with one or more of the following
132 objectives:
133 a) as part of a research and/or development programme in the design of an innovative support;
134 b) to verify compliance of the support design with the specifications (also known as type tests on a
135 prototype support);
136 c) to develop and/or validate a new design standard or methodology;
137 d) to develop and/or validate new fabrication processes.
138 When tests are carried out to verify design parameters, the test support shall be identical as far as
139 possible to the serial production supports (see clause 5, first paragraph). Tests on full scale sections
140 or part of the support may also be undertaken.
141 Design tests shall be carried out to at least the design load or to failure, especially when testing
142 according to 4.1b) and/or 4.1c).
143 4.2 Sample tests
144 These are intended for use either prior to or during the fabrication of the production of a batch of
145 supports to act as a check on the quality of the fabrication, or on the materials being used. The
146 support shall be taken at random from the serial production supports during manufacture. The test
147 constitutes the acceptance of the production.
148 Sample tests are taken to a specific percentage of the design load (usually 100 %), as stipulated in
149 the test specification.
150
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151 5. General test criteria
152 For a design test (according to 4.1b) or 4.1c)), the material(s) and the manufacturing processes used
153 in the fabrication of the prototype support shall be to the same specifications as those used during the
154 serial fabrication of the supports. These specifications shall include the member sectional properties,
155 connection details, e.g. bolt or weld sizes, material grades and fabrication processes. Prior to the
156 commencement of the prototype support fabrication, agreement shall be made with regard to the
157 surface coating of the support.
158 Agreement shall also be made with respect to the organization responsible for the checking of the
159 support prior to the testing.
160 If a sample test is required on a production support, the components may be chosen at random from
161 the batch.
162 Whether it is for the design test (according to 4.1b)) or the sample test, the support shall successfully
163 withstand the loads specified by the client.
164 6. Acceptability of test station
165 If required by the client, the testing station shall be accredited by an external organization to
166 perform this type of test according to the procedures of quality assurance defined by ISO/IEC
167 17025.
168 The following minimum requirements shall be fulfilled by the test station:
169 – the layout of the station is generally safe (e.g. in case of structure collapse the control building and
170 the observation area are not located in the danger zone)
171 – the station has adequate provision to limit the severity of the collapse of the tower in the event of a
172 failure (e.g. back-stays or others)
173 – all personnel is provided with adequate personal safety equipment, have received proper training,
174 and all procedures has been validated from the safety point of view
175 – all lifting equipment has been regularly maintained, tested and certified
176 – the station pad is clear of loose material during the test
177 – the rigging equipment is well maintained (e.g. pulley blocks greased), tested and certified
178 – the load application dev
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